A few Pittsburgh Area libraries, namely Mt. Lebanon, Bridgeville, and Western Allegheny Community Library, have teamed up through Extra Life to help raise money for the Children's Hospital of Pittsburgh. The aptly named Dewey Decimators, have already blasted their way to within a few dollars of their initial $500 goal, and are holding various community gaming events for their marathon on July 21, 2017 at each of their respective locations.
A more detailed list of their scheduled activities is listed on their team page at https://www.extra-life.org/index.cfm?fuseaction=donorDrive.team&teamID=34639 or
you can visit each of their websites and check out their calendar of events.
Mt Lebanon Public Library: http://www.mtlebanonlibrary.org/
Bridgeville Public Library: http://bridgevillelibrary.org/
Western Allegheny Community Library: http://westernalleghenylibrary.org/
All three libraries are providing activities for free, but would prefer that those participating in marathon activities to join their team.